These savory balsamic-glazed portobello burgers deliver restaurant-quality flavor with just a few simple ingredients. Marinated in aromatic herbs and tangy balsamic vinegar, these juicy mushroom caps make the perfect meat-free burger that satisfies even the most devoted carnivores.
Whisk together balsamic vinegar, olive oil, garlic, basil, oregano (if using), salt, and pepper in a shallow dish.
Place mushroom caps in the marinade and let sit for 15 minutes, flipping and basting once halfway through.
Preheat grill to medium-high heat.
Cook marinated mushrooms on the grill for about 5 minutes per side, until tender and grill marks appear.
Assemble burgers with your preferred toppings and serve immediately.
Notes
Remove mushroom stems and scrape out dark gills with a spoon for better textureFresh herbs can be substituted for dried - use 1 tablespoon fresh basil and oreganoPan-frying works as an alternative to grilling - cook in a hot skillet for same timingMake-ahead option: marinate mushrooms up to 4 hours in refrigerator for deeper flavorTry topping with fresh mozzarella, arugula, and roasted red peppers for extra flavorMushrooms can be stored in marinade for up to 24 hours before cooking